* refs/heads/tmp-6e0411b:
Revert "thermal: Fix locking in cooling device sysfs update cur_state"
Linux 4.19.21
ath9k: dynack: check da->enabled first in sampling routines
ath9k: dynack: make ewma estimation faster
perf/x86/intel: Delay memory deallocation until x86_pmu_dead_cpu()
IB/hfi1: Add limit test for RC/UC send via loopback
cacheinfo: Keep the old value if of_property_read_u32 fails
serial: sh-sci: Do not free irqs that have already been freed
serial: 8250_pci: Make PCI class test non fatal
serial: fix race between flush_to_ldisc and tty_open
perf tests evsel-tp-sched: Fix bitwise operator
perf/core: Don't WARN() for impossible ring-buffer sizes
x86/MCE: Initialize mce.bank in the case of a fatal error in mce_no_way_out()
perf/x86/intel/uncore: Add Node ID mask
cpu/hotplug: Fix "SMT disabled by BIOS" detection for KVM
KVM: nVMX: unconditionally cancel preemption timer in free_nested (CVE-2019-7221)
kvm: fix kvm_ioctl_create_device() reference counting (CVE-2019-6974)
KVM: x86: work around leak of uninitialized stack contents (CVE-2019-7222)
scsi: aic94xx: fix module loading
scsi: cxlflash: Prevent deadlock when adapter probe fails
staging: speakup: fix tty-operation NULL derefs
usb: gadget: musb: fix short isoc packets with inventra dma
usb: gadget: udc: net2272: Fix bitwise and boolean operations
usb: dwc3: gadget: Handle 0 xfer length for OUT EP
usb: phy: am335x: fix race condition in _probe
irqchip/gic-v3-its: Plug allocation race for devices sharing a DevID
futex: Handle early deadlock return correctly
dmaengine: imx-dma: fix wrong callback invoke
dmaengine: bcm2835: Fix abort of transactions
dmaengine: bcm2835: Fix interrupt race on RT
HID: debug: fix the ring buffer implementation
fuse: handle zero sized retrieve correctly
fuse: decrement NR_WRITEBACK_TEMP on the right page
fuse: call pipe_buf_release() under pipe lock
ALSA: hda/realtek - Headset microphone support for System76 darp5
ALSA: hda/realtek - Use a common helper for hp pin reference
ALSA: hda/realtek - Fix lose hp_pins for disable auto mute
ALSA: hda - Serialize codec registrations
ALSA: usb-audio: Add support for new T+A USB DAC
ALSA: compress: Fix stop handling on compressed capture streams
xfs: eof trim writeback mapping as soon as it is cached
net/mlx5e: FPGA, fix Innova IPsec TX offload data path performance
virtio_net: Account for tx bytes and packets on sending xdp_frames
skge: potential memory corruption in skge_get_regs()
sctp: walk the list of asoc safely
sctp: check and update stream->out_curr when allocating stream_out
rxrpc: bad unlock balance in rxrpc_recvmsg
Revert "net: phy: marvell: avoid pause mode on SGMII-to-Copper for 88e151x"
rds: fix refcount bug in rds_sock_addref
net: systemport: Fix WoL with password after deep sleep
net/mlx5e: Force CHECKSUM_UNNECESSARY for short ethernet frames
net: dsa: slave: Don't propagate flag changes on down slave interfaces
net: dsa: mv88e6xxx: Fix counting of ATU violations
net: dsa: Fix NULL checking in dsa_slave_set_eee()
net: dsa: Fix lockdep false positive splat
net: dp83640: expire old TX-skb
lib/test_rhashtable: Make test_insert_dup() allocate its hash table dynamically
enic: fix checksum validation for IPv6
dccp: fool proof ccid_hc_[rt]x_parse_options()
thermal: hwmon: inline helpers when CONFIG_THERMAL_HWMON is not set
xfs: fix inverted return from xfs_btree_sblock_verify_crc
xfs: fix PAGE_MASK usage in xfs_free_file_space
fs/xfs: fix f_ffree value for statfs when project quota is set
xfs: delalloc -> unwritten COW fork allocation can go wrong
xfs: fix transient reference count error in xfs_buf_resubmit_failed_buffers
xfs: fix shared extent data corruption due to missing cow reservation
xfs: fix overflow in xfs_attr3_leaf_verify
xfs: Fix error code in 'xfs_ioc_getbmap()'
xfs: cancel COW blocks before swapext
xfs: Fix xqmstats offsets in /proc/fs/xfs/xqmstat
scripts/gdb: fix lx-version string output
kernel/kcov.c: mark write_comp_data() as notrace
exec: load_script: don't blindly truncate shebang string
fs/epoll: drop ovflist branch prediction
kernel/hung_task.c: force console verbose before panic
proc/sysctl: fix return error for proc_doulongvec_minmax()
kernel/hung_task.c: break RCU locks based on jiffies
arm64/sve: ptrace: Fix SVE_PT_REGS_OFFSET definition
HID: lenovo: Add checks to fix of_led_classdev_register
thermal: generic-adc: Fix adc to temp interpolation
PCI: imx: Enable MSI from downstream components
kdb: Don't back trace on a cpu that didn't round up
thermal: bcm2835: enable hwmon explicitly
block/swim3: Fix -EBUSY error when re-opening device after unmount
fsl/fman: Use GFP_ATOMIC in {memac,tgec}_add_hash_mac_address()
gdrom: fix a memory leak bug
isdn: hisax: hfc_pci: Fix a possible concurrency use-after-free bug in HFCPCI_l1hw()
zram: fix lockdep warning of free block handling
mm/page_alloc.c: don't call kasan_free_pages() at deferred mem init
ocfs2: improve ocfs2 Makefile
ocfs2: don't clear bh uptodate for block read
arch/sh/boards/mach-kfr2r09/setup.c: fix struct mtd_oob_ops build warning
scripts/decode_stacktrace: only strip base path when a prefix of the path
perf python: Do not force closing original perf descriptor in evlist.get_pollfd()
cgroup: fix parsing empty mount option string
f2fs: fix sbi->extent_list corruption issue
niu: fix missing checks of niu_pci_eeprom_read
um: Avoid marking pages with "changed protection"
f2fs: fix use-after-free issue when accessing sbi->stat_info
cifs: check ntwrk_buf_start for NULL before dereferencing it
MIPS: ralink: Select CONFIG_CPU_MIPSR2_IRQ_VI on MT7620/8
crypto: ux500 - Use proper enum in hash_set_dma_transfer
crypto: ux500 - Use proper enum in cryp_set_dma_transfer
seq_buf: Make seq_buf_puts() null-terminate the buffer
hwmon: (lm80) fix a missing check of bus read in lm80 probe
hwmon: (lm80) fix a missing check of the status of SMBus read
perf build: Don't unconditionally link the libbfd feature test to -liberty and -lz
NFS: nfs_compare_mount_options always compare auth flavors.
kvm: Change offset in kvm_write_guest_offset_cached to unsigned
powerpc/fadump: Do not allow hot-remove memory from fadump reserved area.
KVM: x86: svm: report MSR_IA32_MCG_EXT_CTL as unsupported
pinctrl: meson: meson8b: fix the GPIO function for the GPIOAO pins
pinctrl: meson: meson8: fix the GPIO function for the GPIOAO pins
powerpc/mm: Fix reporting of kernel execute faults on the 8xx
fbdev: fbcon: Fix unregister crash when more than one framebuffer
ACPI/APEI: Clear GHES block_status before panic()
igb: Fix an issue that PME is not enabled during runtime suspend
ice: Do not enable NAPI on q_vectors that have no rings
i40e: define proper net_device::neigh_priv_len
fbdev: fbmem: behave better with small rotated displays and many CPUs
md: fix raid10 hang issue caused by barrier
video: clps711x-fb: release disp device node in probe()
drm/amd/display: validate extended dongle caps
drbd: Avoid Clang warning about pointless switch statment
drbd: skip spurious timeout (ping-timeo) when failing promote
drbd: disconnect, if the wrong UUIDs are attached on a connected peer
drbd: narrow rcu_read_lock in drbd_sync_handshake
mlx5: update timecounter at least twice per counter overflow
powerpc/powernv/ioda: Allocate indirect TCE levels of cached userspace addresses on demand
iwlwifi: mvm: fix setting HE ppe FW config
powerpc/perf: Fix thresholding counter data for unknown type
net: hns3: add max vector number check for pf
cw1200: Fix concurrency use-after-free bugs in cw1200_hw_scan()
scsi: smartpqi: increase fw status register read timeout
scsi: smartpqi: correct volume status
scsi: smartpqi: correct host serial num for ssa
mlxsw: spectrum: Properly cleanup LAG uppers when removing port from LAG
xfrm6_tunnel: Fix spi check in __xfrm6_tunnel_alloc_spi
mac80211: fix radiotap vendor presence bitmap handling
powerpc/uaccess: fix warning/error with access_ok()
drm/amd/display: fix YCbCr420 blank color
Bluetooth: hci_bcm: Handle deferred probing for the clock supply
drm/amd/display: Add retry to read ddc_clock pin
net: hns3: fix incomplete uninitialization of IRQ in the hns3_nic_uninit_vector_data()
percpu: convert spin_lock_irq to spin_lock_irqsave.
perf tools: Cast off_t to s64 to avoid warning on bionic libc
perf header: Fix up argument to ctime()
usb: musb: dsps: fix runtime pm for peripheral mode
usb: musb: dsps: fix otg state machine
arm64: KVM: Skip MMIO insn after emulation
livepatch: check kzalloc return values
tools/power/x86/intel_pstate_tracer: Fix non root execution for post processing a trace file
bnxt_en: Disable MSIX before re-reserving NQs/CMPL rings.
i2c: sh_mobile: Add support for r8a774c0 (RZ/G2E)
perf probe: Fix unchecked usage of strncpy()
btrfs: use tagged writepage to mitigate livelock of snapshot
perf header: Fix unchecked usage of strncpy()
perf dso: Fix unchecked usage of strncpy()
perf test: Fix perf_event_attr test failure
tty: serial: samsung: Properly set flags in autoCTS mode
serial: sh-sci: Resume PIO in sci_rx_interrupt() on DMA failure
serial: sh-sci: Fix locking in sci_submit_rx()
btrfs: harden agaist duplicate fsid on scanned devices
usb: renesas_usbhs: add support for RZ/G2E
mmc: jz4740: Get CD/WP GPIOs from descriptors
mmc: sdhci-xenon: Fix timeout checks
mmc: sdhci-omap: Fix timeout checks
mmc: sdhci-of-esdhc: Fix timeout checks
memstick: Prevent memstick host from getting runtime suspended during card detection
mmc: meson-mx-sdio: check devm_kasprintf for failure
mmc: bcm2835: reset host on timeout
mmc: bcm2835: Recover from MMC_SEND_EXT_CSD
KVM: PPC: Book3S: Only report KVM_CAP_SPAPR_TCE_VFIO on powernv machines
ASoC: fsl: Fix SND_SOC_EUKREA_TLV320 build error on i.MX8M
ARM: pxa: avoid section mismatch warning
selftests/bpf: use __bpf_constant_htons in test_prog.c
switchtec: Fix SWITCHTEC_IOCTL_EVENT_IDX_ALL flags overwrite
udf: Fix BUG on corrupted inode
mlxsw: spectrum_acl: Limit priority value
phy: sun4i-usb: add support for missing USB PHY index
i2c-axxia: check for error conditions first
lightnvm: pblk: add lock protection to list operations
lightnvm: pblk: fix resubmission of overwritten write err lbas
drm/msm: dpu: Only check flush register against pending flushes
drm/msm/dsi: fix dsi clock names in DSI 10nm PLL driver
tee: optee: avoid possible double list_del()
OPP: Use opp_table->regulators to verify no regulator case
cpuidle: big.LITTLE: fix refcount leak
platform/x86: mlx-platform: Fix tachometer registers
clk: imx6sl: ensure MMDC CH0 handshake is bypassed
sata_rcar: fix deferred probing
iommu/arm-smmu-v3: Use explicit mb() when moving cons pointer
iommu/arm-smmu: Add support for qcom,smmu-v2 variant
iommu/arm-smmu-v3: Avoid memory corruption from Hisilicon MSI payloads
usb: dwc3: gadget: Disable CSP for stream OUT ep
ARM: dts: imx51-zii-rdu1: Do not specify "power-gpio" for hpa1
watchdog: renesas_wdt: don't set divider while watchdog is running
ARM: dts: Fix up the D-Link DIR-685 MTD partition info
media: coda: fix H.264 deblocking filter controls
mips: bpf: fix encoding bug for mm_srlv32_op
ARM: dts: Fix OMAP4430 SDP Ethernet startup
iommu/amd: Fix amd_iommu=force_isolation
pinctrl: sx150x: handle failure case of devm_kstrdup
gpio: mt7621: pass mediatek_gpio_bank_probe() failure up the stack
gpio: mt7621: report failure of devm_kasprintf()
usb: dwc3: trace: add missing break statement to make compiler happy
IB/hfi1: Unreserve a reserved request when it is completed
kobject: return error code if writing /sys/.../uevent fails
driver core: Move async_synchronize_full call
tipc: fix node keep alive interval calculation
drm/amdgpu/powerplay: fix clock stretcher limits on polaris (v2)
media: imx274: select REGMAP_I2C
clk: sunxi-ng: a33: Set CLK_SET_RATE_PARENT for all audio module clocks
usb: mtu3: fix the issue about SetFeature(U1/U2_Enable)
timekeeping: Use proper seqcount initializer
usb: hub: delay hub autosuspend if USB3 port is still link training
usb: dwc2: Disable power down feature on Samsung SoCs
usb: dwc3: Correct the logic for checking TRB full in __dwc3_prepare_one_trb()
xtensa: xtfpga.dtsi: fix dtc warnings about SPI
smack: fix access permissions for keyring
media: DaVinci-VPBE: fix error handling in vpbe_initialize()
media: i2c: TDA1997x: select CONFIG_HDMI
x86/fpu: Add might_fault() to user_insn()
ARM: dts: aspeed: add missing memory unit-address
ARM: dts: mmp2: fix TWSI2
drm/v3d: Fix prime imports of buffers from other drivers.
arm64: ftrace: don't adjust the LR value
mt76x0: dfs: fix IBI_R11 configuration on non-radar channels
s390/zcrypt: improve special ap message cmd handling
firmware/efi: Add NULL pointer checks in efivars API functions
thermal: Fix locking in cooling device sysfs update cur_state
Thermal: do not clear passive state during system sleep
arm64: io: Ensure value passed to __iormb() is held in a 64-bit register
perf: arm_spe: handle devm_kasprintf() failure
drm: Clear state->acquire_ctx before leaving drm_atomic_helper_commit_duplicated_state()
nfsd4: fix crash on writing v4_end_grace before nfsd startup
soc: bcm: brcmstb: Don't leak device tree node reference
sunvdc: Do not spin in an infinite loop when vio_ldc_send() returns EAGAIN
net: aquantia: return 'err' if set MPI_DEINIT state fails
arm64: io: Ensure calls to delay routines are ordered against prior readX()
i2c: sh_mobile: add support for r8a77990 (R-Car E3)
f2fs: fix wrong return value of f2fs_acl_create
f2fs: fix race between write_checkpoint and write_begin
f2fs: move dir data flush to write checkpoint process
staging: pi433: fix potential null dereference
ACPI: SPCR: Consider baud rate 0 as preconfigured state
media: adv*/tc358743/ths8200: fill in min width/height/pixelclock
iio: accel: kxcjk1013: Add KIOX010A ACPI Hardware-ID
iio: adc: meson-saradc: fix internal clock names
iio: adc: meson-saradc: check for devm_kasprintf failure
powerpc/32: Add .data..Lubsan_data*/.data..Lubsan_type* sections explicitly
dmaengine: xilinx_dma: Remove __aligned attribute on zynqmp_dma_desc_ll
ptp: Fix pass zero to ERR_PTR() in ptp_clock_register
clk: meson: meson8b: mark the CPU clock as CLK_IS_CRITICAL
clk: meson: meson8b: fix the width of the cpu_scale_div clock
clk: meson: meson8b: do not use cpu_div3 for cpu_scale_out_sel
staging: erofs: fix the definition of DBG_BUGON
media: mtk-vcodec: Release device nodes in mtk_vcodec_init_enc_pm()
media: video-i2c: avoid accessing released memory area when removing driver
media: rc: ensure close() is called on rc_unregister_device
soc/tegra: Don't leak device tree node reference
perf tools: Add Hygon Dhyana support
modpost: validate symbol names also in find_elf_symbol
net/mlx5: EQ, Use the right place to store/read IRQ affinity hint
bpf: libbpf: retry map creation without the name
drm/amd/display: calculate stream->phy_pix_clk before clock mapping
drm/amd/display: fix gamma not being applied correctly
ARM: OMAP2+: hwmod: Fix some section annotations
drm/rockchip: fix for mailbox read size
usbnet: smsc95xx: fix rx packet alignment
staging: iio: ad7780: update voltage on read
scsi: hisi_sas: change the time of SAS SSP connection
i40e: prevent overlapping tx_timeout recover
platform/chrome: don't report EC_MKBP_EVENT_SENSOR_FIFO as wakeup
vbox: fix link error with 'gcc -Og'
fpga: altera-cvp: fix 'bad IO access' on x86_64
Tools: hv: kvp: Fix a warning of buffer overflow with gcc 8.0.1
fpga: altera-cvp: Fix registration for CvP incapable devices
staging:iio:ad2s90: Make probe handle spi_setup failure
iwlwifi: fw: do not set sgi bits for HE connection
dpaa2-ptp: defer probe when portal allocation failed
MIPS: Boston: Disable EG20T prefetch
ptp: check gettime64 return code in PTP_SYS_OFFSET ioctl
serial: fsl_lpuart: clear parity enable bit when disable parity
drm/vc4: ->x_scaling[1] should never be set to VC4_SCALING_NONE
crypto: aes_ti - disable interrupts while accessing S-box
powerpc/pseries: add of_node_put() in dlpar_detach_node()
x86/PCI: Fix Broadcom CNB20LE unintended sign extension (redux)
dlm: Don't swamp the CPU with callbacks queued during recovery
clk: boston: fix possible memory leak in clk_boston_setup()
ARM: 8808/1: kexec:offline panic_smp_self_stop CPU
scsi: lpfc: Fix LOGO/PLOGI handling when triggerd by ABTS Timeout event
scsi: mpt3sas: Call sas_remove_host before removing the target devices
scsi: lpfc: Correct LCB RJT handling
ath9k: dynack: use authentication messages for 'late' ack
ath10k: assign 'n_cipher_suites' for WCN3990
wil6210: fix memory leak in wil_find_tx_bcast_2
wil6210: fix reset flow for Talyn-mb
nds32: Fix gcc 8.0 compiler option incompatible.
gpu: ipu-v3: image-convert: Prevent race between run and unprepare
genirq/affinity: Spread IRQs to all available NUMA nodes
drm/sun4i: Initialize registers in tcon-top driver
gpiolib: Fix possible use after free on label
ASoC: Intel: mrfld: fix uninitialized variable access
pinctrl: bcm2835: Use raw spinlock for RT compatibility
drm/vgem: Fix vgem_init to get drm device available.
staging: iio: adc: ad7280a: handle error from __ad7280_read32()
drm/bufs: Fix Spectre v1 vulnerability
devres: Align data[] to ARCH_KMALLOC_MINALIGN
ANDROID: Turn xt_owner module on
UPSTREAM: virt_wifi: fix error return code in virt_wifi_newlink()
Conflicts:
arch/arm64/include/asm/io.h
drivers/iommu/arm-smmu.c
drivers/thermal/thermal_core.c
Change-Id: Ic348640eaeb3501bfc61d0b6907b7fcbb83f5118
Signed-off-by: Ivaylo Georgiev <irgeorgiev@codeaurora.org>
[ Upstream commit 1b57ec8c75279b873639eb44a215479236f93481 ]
As of commit 6460d3201471 ("arm64: io: Ensure calls to delay routines
are ordered against prior readX()"), MMIO reads smaller than 64 bits
fail to compile under clang because we end up mixing 32-bit and 64-bit
register operands for the same data processing instruction:
./include/asm-generic/io.h:695:9: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
return readb(addr);
^
./arch/arm64/include/asm/io.h:147:58: note: expanded from macro 'readb'
^
./include/asm-generic/io.h:695:9: note: use constraint modifier "w"
./arch/arm64/include/asm/io.h:147:50: note: expanded from macro 'readb'
^
./arch/arm64/include/asm/io.h:118:24: note: expanded from macro '__iormb'
asm volatile("eor %0, %1, %1\n" \
^
Fix the build by casting the macro argument to 'unsigned long' when used
as an input to the inline asm.
Reported-by: Nick Desaulniers <nick.desaulniers@gmail.com>
Reported-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 6460d32014717686d3b7963595950ba2c6d1bb5e ]
A relatively standard idiom for ensuring that a pair of MMIO writes to a
device arrive at that device with a specified minimum delay between them
is as follows:
writel_relaxed(42, dev_base + CTL1);
readl(dev_base + CTL1);
udelay(10);
writel_relaxed(42, dev_base + CTL2);
the intention being that the read-back from the device will push the
prior write to CTL1, and the udelay will hold up the write to CTL1 until
at least 10us have elapsed.
Unfortunately, on arm64 where the underlying delay loop is implemented
as a read of the architected counter, the CPU does not guarantee
ordering from the readl() to the delay loop and therefore the delay loop
could in theory be speculated and not provide the desired interval
between the two writes.
Fix this in a similar manner to PowerPC by introducing a dummy control
dependency on the output of readX() which, combined with the ISB in the
read of the architected counter, guarantees that a subsequent delay loop
can not be executed until the readX() has returned its result.
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
There is something strange in the big-endian io operations
that doesn't work with the RTB logging macros. Switch the
big-endian operations to no_log since they are unlikely
to be used in conjunction with RTB anyway.
Change-Id: Ic0dedbad12279907fc38e079db1b8c7bf662636b
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Redefine __raw_readv and __raw_writev for
RTB support.
Change-Id: Iae7b8e920abc4f23846690d3d1b3d1d933454788
Signed-off-by: Xiaogang Cui <xiaogang@codeaurora.org>
lib: iomap: Add MSM RTB support
The ioread* and the iowrite* functions and not inlined and hence
the RTB logs end up containing the ioread and iowrite functions
themselves and not the ones invoking them.
Add RTB support to the ioread*and iowrite* functions so that we can
get meaningful RTB logs.
Note that to avoid multiple RTB logs for ioread* and iowrite*
functions, read*_no_log and write*_no_log macros are added.
Change-Id: I2315d44c4dfbeee6be4a52f21bf4a20dd9508597
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>
Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>
The PCI bus specification (rev 3.0, 3.2.5 "Transaction Ordering and
Posting") defines rules for PCI configuration space transactions ordering
and posting, that state that configuration writes are non-posted
transactions.
This rule is reinforced by the ARM v8 architecture reference manual (issue
A.k, Early Write Acknowledgment) that explicitly recommends that No Early
Write Acknowledgment attribute should be used to map PCI configuration
(write) transactions.
Current ioremap interface on ARM64 implements mapping functions where the
Early Write Acknowledgment hint is enabled, so they cannot be used to map
PCI configuration space in a PCI specs compliant way.
Implement an ARM64 specific pci_remap_cfgspace() interface that allows to
map PCI config region with nGnRnE attributes, providing a remap function
that complies with PCI specifications and the ARMv8 architecture reference
manual recommendations.
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
No need for it - we only use struct bio_vec in prototypes and already have
forward declarations for it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
When zeroing an I/O location, the current accessors are forced to
allocate a temporary register to store the zero for the write. By
tweaking the assembly constraints, we can allow the compiler to use
the zero register directly in such cases, and save some juggling.
Compiling a representative kernel configuration with GCC 6 shows
that 2.3KB worth of code can be wasted just on that!
text data bss dec hex filename
13316776 3248256 18176769 34741801 2121e29 vmlinux.o.new
13319140 3248256 18176769 34744165 2122765 vmlinux.o.old
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
The code that provides /dev/mem uses xlate_dev_mem_{k,}ptr() to
avoid making a cachable mapping of a non-cachable area on ia64.
On arm64 we do this via phys_mem_access_prot() instead, but provide
dummy versions of xlate_dev_mem_{k,}ptr().
These are the same as those in asm-generic/io.h, which we include from
asm/io.h
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Pull arm64 updates from Catalin Marinas:
"Mostly refactoring/clean-up:
- CPU ops and PSCI (Power State Coordination Interface) refactoring
following the merging of the arm64 ACPI support, together with
handling of Trusted (secure) OS instances
- Using fixmap for permanent FDT mapping, removing the initial dtb
placement requirements (within 512MB from the start of the kernel
image). This required moving the FDT self reservation out of the
memreserve processing
- Idmap (1:1 mapping used for MMU on/off) handling clean-up
- Removing flush_cache_all() - not safe on ARM unless the MMU is off.
Last stages of CPU power down/up are handled by firmware already
- "Alternatives" (run-time code patching) refactoring and support for
immediate branch patching, GICv3 CPU interface access
- User faults handling clean-up
And some fixes:
- Fix for VDSO building with broken ELF toolchains
- Fix another case of init_mm.pgd usage for user mappings (during
ASID roll-over broadcasting)
- Fix for FPSIMD reloading after CPU hotplug
- Fix for missing syscall trace exit
- Workaround for .inst asm bug
- Compat fix for switching the user tls tpidr_el0 register"
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (42 commits)
arm64: use private ratelimit state along with show_unhandled_signals
arm64: show unhandled SP/PC alignment faults
arm64: vdso: work-around broken ELF toolchains in Makefile
arm64: kernel: rename __cpu_suspend to keep it aligned with arm
arm64: compat: print compat_sp instead of sp
arm64: mm: Fix freeing of the wrong memmap entries with !SPARSEMEM_VMEMMAP
arm64: entry: fix context tracking for el0_sp_pc
arm64: defconfig: enable memtest
arm64: mm: remove reference to tlb.S from comment block
arm64: Do not attempt to use init_mm in reset_context()
arm64: KVM: Switch vgic save/restore to alternative_insn
arm64: alternative: Introduce feature for GICv3 CPU interface
arm64: psci: fix !CONFIG_HOTPLUG_CPU build warning
arm64: fix bug for reloading FPSIMD state after CPU hotplug.
arm64: kernel thread don't need to save fpsimd context.
arm64: fix missing syscall trace exit
arm64: alternative: Work around .inst assembler bugs
arm64: alternative: Merge alternative-asm.h into alternative.h
arm64: alternative: Allow immediate branch as alternative instruction
arm64: Rework alternate sequence for ARM erratum 845719
...
This resolves the following sparse warning from readl() and other
macros, which ends up embedding readl_relaxed() using the same
variable.
Warning log:
include/asm-generic/io.h:364:16: warning: symbol '__v' shadows an
earlier one
include/asm-generic/io.h:364:16: originally declared here
include/asm-generic/io.h:372:16: warning: symbol '__v' shadows an
earlier one
include/asm-generic/io.h:372:16: originally declared here
include/asm-generic/io.h:380:16: warning: symbol '__v' shadows an
earlier one
include/asm-generic/io.h:380:16: originally declared here
include/asm-generic/io.h:568:16: warning: symbol '__v' shadows an
earlier one
include/asm-generic/io.h:568:16: originally declared here
include/asm-generic/io.h:576:16: warning: symbol '__v' shadows an
earlier one
include/asm-generic/io.h:576:16: originally declared here
include/asm-generic/io.h:584:16: warning: symbol '__v' shadows an
earlier one
include/asm-generic/io.h:584:16: originally declared here
The same patch was already applied to arm32 as
"ARM: 7118/1: rename temp variable in read*_relaxed()"
(sha1: b0c1264f53)
Acked-by: Liviu Dudau <Liviu.Dudau@arm.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
PCI IO space was intended to be 16MiB, at 32MiB below MODULES_VADDR, but
commit d1e6dc91b5 ("arm64: Add architectural support for PCI")
extended this to cover the full 32MiB. The final 8KiB of this 32MiB is
also allocated for the fixmap, allowing for potential clashes between
the two.
This change was masked by assumptions in mem_init and the page table
dumping code, which assumed the I/O space to be 16MiB long through
seaparte hard-coded definitions.
This patch changes the definition of the PCI I/O space allocation to
live in asm/memory.h, along with the other VA space allocations. As the
fixmap allocation depends on the number of fixmap entries, this is moved
below the PCI I/O space allocation. Both the fixmap and PCI I/O space
are guarded with 2MB of padding. Sites assuming the I/O space was 16MiB
are moved over use new PCI_IO_{START,END} definitions, which will keep
in sync with the size of the IO space (now restored to 16MiB).
As a useful side effect, the use of the new PCI_IO_{START,END}
definitions prevents a build issue in the dumping code due to a (now
redundant) missing include of io.h for PCI_IOBASE.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Laura Abbott <lauraa@codeaurora.org>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Steve Capper <steve.capper@linaro.org>
Cc: Will Deacon <will.deacon@arm.com>
[catalin.marinas@arm.com: reorder FIXADDR and PCI_IO address_markers_idx enum]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Pull asm-generic asm/io.h rewrite from Arnd Bergmann:
"While there normally is no reason to have a pull request for
asm-generic but have all changes get merged through whichever tree
needs them, I do have a series for 3.19.
There are two sets of patches that change significant portions of
asm/io.h, and this branch contains both in order to resolve the
conflicts:
- Will Deacon has done a set of patches to ensure that all
architectures define {read,write}{b,w,l,q}_relaxed() functions or
get them by including asm-generic/io.h.
These functions are commonly used on ARM specific drivers to avoid
expensive L2 cache synchronization implied by the normal
{read,write}{b,w,l,q}, but we need to define them on all
architectures in order to share the drivers across architectures
and to enable CONFIG_COMPILE_TEST configurations for them
- Thierry Reding has done an unrelated set of patches that extends
the asm-generic/io.h file to the degree necessary to make it useful
on ARM64 and potentially other architectures"
* tag 'asm-generic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (29 commits)
ARM64: use GENERIC_PCI_IOMAP
sparc: io: remove duplicate relaxed accessors on sparc32
ARM: sa11x0: Use void __iomem * in MMIO accessors
arm64: Use include/asm-generic/io.h
ARM: Use include/asm-generic/io.h
asm-generic/io.h: Implement generic {read,write}s*()
asm-generic/io.h: Reconcile I/O accessor overrides
/dev/mem: Use more consistent data types
Change xlate_dev_{kmem,mem}_ptr() prototypes
ARM: ixp4xx: Properly override I/O accessors
ARM: ixp4xx: Fix build with IXP4XX_INDIRECT_PCI
ARM: ebsa110: Properly override I/O accessors
ARC: Remove redundant PCI_IOBASE declaration
documentation: memory-barriers: clarify relaxed io accessor semantics
x86: io: implement dummy relaxed accessor macros for writes
tile: io: implement dummy relaxed accessor macros for writes
sparc: io: implement dummy relaxed accessor macros for writes
powerpc: io: implement dummy relaxed accessor macros for writes
parisc: io: implement dummy relaxed accessor macros for writes
mn10300: io: implement dummy relaxed accessor macros for writes
...
The ARM erratum 832075 applies to certain revisions of Cortex-A57,
one of the workarounds is to change device loads into using
load-aquire semantics.
This is achieved using the alternatives framework.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Include the generic I/O header file so that duplicate implementations
can be removed. This will also help to establish consistency across more
architectures regarding which accessors they support.
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Pull PCI updates from Bjorn Helgaas:
"The interesting things here are:
- Turn on Config Request Retry Status Software Visibility. This
caused hangs last time, but we included a fix this time.
- Rework PCI device configuration to use _HPP/_HPX more aggressively
- Allow PCI devices to be put into D3cold during system suspend
- Add arm64 PCI support
- Add APM X-Gene host bridge driver
- Add TI Keystone host bridge driver
- Add Xilinx AXI host bridge driver
More detailed summary:
Enumeration
- Check Vendor ID only for Config Request Retry Status (Rajat Jain)
- Enable Config Request Retry Status when supported (Rajat Jain)
- Add generic domain handling (Catalin Marinas)
- Generate uppercase hex for modalias interface class (Ricardo Ribalda Delgado)
Resource management
- Add missing MEM_64 mask in pci_assign_unassigned_bridge_resources() (Yinghai Lu)
- Increase IBM ipr SAS Crocodile BARs to at least system page size (Douglas Lehr)
PCI device hotplug
- Prevent NULL dereference during pciehp probe (Andreas Noever)
- Move _HPP & _HPX handling into core (Bjorn Helgaas)
- Apply _HPP to PCIe devices as well as PCI (Bjorn Helgaas)
- Apply _HPP/_HPX to display devices (Bjorn Helgaas)
- Preserve SERR & PARITY settings when applying _HPP/_HPX (Bjorn Helgaas)
- Preserve MPS and MRRS settings when applying _HPP/_HPX (Bjorn Helgaas)
- Apply _HPP/_HPX to all devices, not just hot-added ones (Bjorn Helgaas)
- Fix wait time in pciehp timeout message (Yinghai Lu)
- Add more pciehp Slot Control debug output (Yinghai Lu)
- Stop disabling pciehp notifications during init (Yinghai Lu)
MSI
- Remove arch_msi_check_device() (Alexander Gordeev)
- Rename pci_msi_check_device() to pci_msi_supported() (Alexander Gordeev)
- Move D0 check into pci_msi_check_device() (Alexander Gordeev)
- Remove unused kobject from struct msi_desc (Yijing Wang)
- Remove "pos" from the struct msi_desc msi_attrib (Yijing Wang)
- Add "msi_bus" sysfs MSI/MSI-X control for endpoints (Yijing Wang)
- Use __get_cached_msi_msg() instead of get_cached_msi_msg() (Yijing Wang)
- Use __read_msi_msg() instead of read_msi_msg() (Yijing Wang)
- Use __write_msi_msg() instead of write_msi_msg() (Yijing Wang)
Power management
- Drop unused runtime PM support code for PCIe ports (Rafael J. Wysocki)
- Allow PCI devices to be put into D3cold during system suspend (Rafael J. Wysocki)
AER
- Add additional AER error strings (Gong Chen)
- Make <linux/aer.h> standalone includable (Thierry Reding)
Virtualization
- Add ACS quirk for Solarflare SFC9120 & SFC9140 (Alex Williamson)
- Add ACS quirk for Intel 10G NICs (Alex Williamson)
- Add ACS quirk for AMD A88X southbridge (Marti Raudsepp)
- Remove unused pci_find_upstream_pcie_bridge(), pci_get_dma_source() (Alex Williamson)
- Add device flag helpers (Ethan Zhao)
- Assume all Mellanox devices have broken INTx masking (Gavin Shan)
Generic host bridge driver
- Fix ioport_map() for !CONFIG_GENERIC_IOMAP (Liviu Dudau)
- Add pci_register_io_range() and pci_pio_to_address() (Liviu Dudau)
- Define PCI_IOBASE as the base of virtual PCI IO space (Liviu Dudau)
- Fix the conversion of IO ranges into IO resources (Liviu Dudau)
- Add pci_get_new_domain_nr() and of_get_pci_domain_nr() (Liviu Dudau)
- Add support for parsing PCI host bridge resources from DT (Liviu Dudau)
- Add pci_remap_iospace() to map bus I/O resources (Liviu Dudau)
- Add arm64 architectural support for PCI (Liviu Dudau)
APM X-Gene
- Add APM X-Gene PCIe driver (Tanmay Inamdar)
- Add arm64 DT APM X-Gene PCIe device tree nodes (Tanmay Inamdar)
Freescale i.MX6
- Probe in module_init(), not fs_initcall() (Lucas Stach)
- Delay enabling reference clock for SS until it stabilizes (Tim Harvey)
Marvell MVEBU
- Fix uninitialized variable in mvebu_get_tgt_attr() (Thomas Petazzoni)
NVIDIA Tegra
- Make sure the PCIe PLL is really reset (Eric Yuen)
- Add error path tegra_msi_teardown_irq() cleanup (Jisheng Zhang)
- Fix extended configuration space mapping (Peter Daifuku)
- Implement resource hierarchy (Thierry Reding)
- Clear CLKREQ# enable on port disable (Thierry Reding)
- Add Tegra124 support (Thierry Reding)
ST Microelectronics SPEAr13xx
- Pass config resource through reg property (Pratyush Anand)
Synopsys DesignWare
- Use NULL instead of false (Fabio Estevam)
- Parse bus-range property from devicetree (Lucas Stach)
- Use pci_create_root_bus() instead of pci_scan_root_bus() (Lucas Stach)
- Remove pci_assign_unassigned_resources() (Lucas Stach)
- Check private_data validity in single place (Lucas Stach)
- Setup and clear exactly one MSI at a time (Lucas Stach)
- Remove open-coded bitmap operations (Lucas Stach)
- Fix configuration base address when using 'reg' (Minghuan Lian)
- Fix IO resource end address calculation (Minghuan Lian)
- Rename get_msi_data() to get_msi_addr() (Minghuan Lian)
- Add get_msi_data() to pcie_host_ops (Minghuan Lian)
- Add support for v3.65 hardware (Murali Karicheri)
- Fold struct pcie_port_info into struct pcie_port (Pratyush Anand)
TI Keystone
- Add TI Keystone PCIe driver (Murali Karicheri)
- Limit MRSS for all downstream devices (Murali Karicheri)
- Assume controller is already in RC mode (Murali Karicheri)
- Set device ID based on SoC to support multiple ports (Murali Karicheri)
Xilinx AXI
- Add Xilinx AXI PCIe driver (Srikanth Thokala)
- Fix xilinx_pcie_assign_msi() return value test (Dan Carpenter)
Miscellaneous
- Clean up whitespace (Quentin Lambert)
- Remove assignments from "if" conditions (Quentin Lambert)
- Move PCI_VENDOR_ID_VMWARE to pci_ids.h (Francesco Ruggeri)
- x86: Mark DMI tables as initialization data (Mathias Krause)
- x86: Move __init annotation to the correct place (Mathias Krause)
- x86: Mark constants of pci_mmcfg_nvidia_mcp55() as __initconst (Mathias Krause)
- x86: Constify pci_mmcfg_probes[] array (Mathias Krause)
- x86: Mark PCI BIOS initialization code as such (Mathias Krause)
- Parenthesize PCI_DEVID and PCI_VPD_LRDT_ID parameters (Megan Kamiya)
- Remove unnecessary variable in pci_add_dynid() (Tobias Klauser)"
* tag 'pci-v3.18-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (109 commits)
arm64: dts: Add APM X-Gene PCIe device tree nodes
PCI: Add ACS quirk for AMD A88X southbridge devices
PCI: xgene: Add APM X-Gene PCIe driver
PCI: designware: Remove open-coded bitmap operations
PCI/MSI: Remove unnecessary temporary variable
PCI/MSI: Use __write_msi_msg() instead of write_msi_msg()
MSI/powerpc: Use __read_msi_msg() instead of read_msi_msg()
PCI/MSI: Use __get_cached_msi_msg() instead of get_cached_msi_msg()
PCI/MSI: Add "msi_bus" sysfs MSI/MSI-X control for endpoints
PCI/MSI: Remove "pos" from the struct msi_desc msi_attrib
PCI/MSI: Remove unused kobject from struct msi_desc
PCI/MSI: Rename pci_msi_check_device() to pci_msi_supported()
PCI/MSI: Move D0 check into pci_msi_check_device()
PCI/MSI: Remove arch_msi_check_device()
irqchip: armada-370-xp: Remove arch_msi_check_device()
PCI/MSI/PPC: Remove arch_msi_check_device()
arm64: Add architectural support for PCI
PCI: Add pci_remap_iospace() to map bus I/O resources
of/pci: Add support for parsing PCI host bridge resources from DT
of/pci: Add pci_get_new_domain_nr() and of_get_pci_domain_nr()
...
Conflicts:
arch/arm64/boot/dts/apm-storm.dtsi
Change the type of physical address from unsigned long to phys_addr_t,
make valid_phys_addr_range more readable.
Signed-off-by: Min-Hua Chen <orca.chen@gmail.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Use the generic PCI domain and OF functions to provide support for PCI
on arm64.
[bhelgaas: Change comments to use generic PCI, not just PCIe. Nothing at
this level is PCIe-specific.]
Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
The primary aim of this patchset is to remove the pgprot_default and
prot_sect_default global variables and rely strictly on predefined
values. The original goal was to be able to run SMP kernels on UP
hardware by not setting the Shareability bit. However, it is unlikely to
see UP ARMv8 hardware and even if we do, the Shareability bit is no
longer assumed to disable cacheable accesses.
A side effect is that the device mappings now have the Shareability
attribute set. The hardware, however, should ignore it since Device
accesses are always Outer Shareable.
Following the removal of the two global variables, there is some PROT_*
macro reshuffling and cleanup, including the __PAGE_* macros (replaced
by PAGE_*).
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
The patch moves the PCI I/O space (currently at 64K) before the
earlyprintk mapping and extends it to 16MB.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This reverts commit 2f7dc60275.
The above commit breaks the mapping type for Device memory because
pgprot_default already contains a Normal memory type. pgprot_default is
also not initialised early enough for earlyprintk resulting in an
inconsistent memory mapping with 64K PAGE_SIZE configuration.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Will Deacon <will.deacon@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Write-combine and cacheable mappings use Normal memory on arm64. On SMP
systems, the pte needs the shareability bit which is set in
pgprot_default. Use this for defining PROT_DEFAULT used by ioremap_wc
and ioremap_cache (Device memory is shareable by default, does not need
additional attributes).
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Pull Xen updates from Konrad Rzeszutek Wilk:
"This has tons of fixes and two major features which are concentrated
around the Xen SWIOTLB library.
The short <blurb> is that the tracing facility (just one function) has
been added to SWIOTLB to make it easier to track I/O progress.
Additionally under Xen and ARM (32 & 64) the Xen-SWIOTLB driver
"is used to translate physical to machine and machine to physical
addresses of foreign[guest] pages for DMA operations" (Stefano) when
booting under hardware without proper IOMMU.
There are also bug-fixes, cleanups, compile warning fixes, etc.
The commit times for some of the commits is a bit fresh - that is b/c
we wanted to make sure we have the Ack's from the ARM folks - which
with the string of back-to-back conferences took a bit of time. Rest
assured - the code has been stewing in #linux-next for some time.
Features:
- SWIOTLB has tracing added when doing bounce buffer.
- Xen ARM/ARM64 can use Xen-SWIOTLB. This work allows Linux to
safely program real devices for DMA operations when running as a
guest on Xen on ARM, without IOMMU support. [*1]
- xen_raw_printk works with PVHVM guests if needed.
Bug-fixes:
- Make memory ballooning work under HVM with large MMIO region.
- Inform hypervisor of MCFG regions found in ACPI DSDT.
- Remove deprecated IRQF_DISABLED.
- Remove deprecated __cpuinit.
[*1]:
"On arm and arm64 all Xen guests, including dom0, run with second
stage translation enabled. As a consequence when dom0 programs a
device for a DMA operation is going to use (pseudo) physical
addresses instead machine addresses. This work introduces two trees
to track physical to machine and machine to physical mappings of
foreign pages. Local pages are assumed mapped 1:1 (physical address
== machine address). It enables the SWIOTLB-Xen driver on ARM and
ARM64, so that Linux can translate physical addresses to machine
addresses for dma operations when necessary. " (Stefano)"
* tag 'stable/for-linus-3.13-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: (32 commits)
xen/arm: pfn_to_mfn and mfn_to_pfn return the argument if nothing is in the p2m
arm,arm64/include/asm/io.h: define struct bio_vec
swiotlb-xen: missing include dma-direction.h
pci-swiotlb-xen: call pci_request_acs only ifdef CONFIG_PCI
arm: make SWIOTLB available
xen: delete new instances of added __cpuinit
xen/balloon: Set balloon's initial state to number of existing RAM pages
xen/mcfg: Call PHYSDEVOP_pci_mmcfg_reserved for MCFG areas.
xen: remove deprecated IRQF_DISABLED
x86/xen: remove deprecated IRQF_DISABLED
swiotlb-xen: fix error code returned by xen_swiotlb_map_sg_attrs
swiotlb-xen: static inline xen_phys_to_bus, xen_bus_to_phys, xen_virt_to_bus and range_straddles_page_boundary
grant-table: call set_phys_to_machine after mapping grant refs
arm,arm64: do not always merge biovec if we are running on Xen
swiotlb: print a warning when the swiotlb is full
swiotlb-xen: use xen_dma_map/unmap_page, xen_dma_sync_single_for_cpu/device
xen: introduce xen_dma_map/unmap_page and xen_dma_sync_single_for_cpu/device
tracing/events: Fix swiotlb tracepoint creation
swiotlb-xen: use xen_alloc/free_coherent_pages
xen: introduce xen_alloc/free_coherent_pages
...
Some drivers (ACPI notably) use ioremap_cache() to map an area which could
either be outside of kernel RAM or in an already mapped reserved area of
RAM. To avoid aliases with different caching attributes, ioremap() does
not allow RAM to be remapped. But for ioremap_cache(), the existing kernel
mapping may be used.
Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This is similar to what it is done on X86: biovecs are prevented from merging
otherwise every dma requests would be forced to bounce on the swiotlb buffer.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Changes in v7:
- remove the extra autotranslate check in biomerge.c.
when compiling with allmodconfig, CONFIG_64BIT=y the file
drivers/base/regmap/regmap-mmio.c will use readq and writeq so we need
implement these functions.
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This patch adds support for "earlyprintk=" parameter on the kernel
command line. The format is:
earlyprintk=<name>[,<addr>][,<options>]
where <name> is the name of the (UART) device, e.g. "pl011", <addr> is
the I/O address. The <options> aren't currently used.
The mapping of the earlyprintk device is done very early during kernel
boot and there are restrictions on which functions it can call. A
special early_io_map() function is added which creates the mapping from
the pre-defined EARLY_IOBASE to the device I/O address passed via the
kernel parameter. The pgd entry corresponding to EARLY_IOBASE is
pre-populated in head.S during kernel boot.
Only PL011 is currently supported and it is assumed that the interface
is already initialised by the boot loader before the kernel is started.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
On AArch64, the meaning of the XN bit has changed to UXN (user). The PXN
(privileged) bit must be set to prevent kernel execution. Without the
PXN bit set, the CPU may speculatively access device memory. This patch
ensures that all the mappings that the kernel must not execute from
(including user mappings) have the PXN bit set.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Even if it works with since the types have the same size, the correct
type of the last __ioremap() argument is pgprot_t rather than pteval_t.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This patch adds several definitions for device communication, including
I/O accessors and ioremap(). The __raw_* accessors are implemented as
inline asm to avoid compiler generation of post-indexed accesses (less
efficient to emulate in a virtualised environment).
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
